President was aware of messages taken by Russian hackers before they were made public during the presidential race, Omarosa Manigault Newman claims

WASHINGTON—President Trump knew about Democratic campaign emails stolen by Russian hackers before they were made public during the 2016 presidential race, Omarosa Manigault Newman, a former top White House aide who was fired in December, claimed Tuesday.

Ms. Manigault Newman, who is promoting a new book, also said she has been interviewed by special counsel Robert Mueller, who is investigating whether the Trump campaign and Russian operatives colluded in helping defeat Hillary Clinton in the election. The campaign and Moscow...

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